SPD74-682M

Part Overview

The SPD74-682M is a 6.8 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 3.4 A with a maximum DC resistance of 42mOhm. This component is classified as obsolete product status. Due to the obsolete classification, identification of functionally compatible substitute parts is necessary to support ongoing system maintenance and procurement activities.

Substiute Parts

SPD74-682M

API Delevan Inc.In Stock: 1022SPD74-682M Datasheet

Current PartRFQ

HRSPD74-682M

API Delevan Inc.In Stock: 1151HRSPD74-682M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute identification for the SPD74-682M is based on electrical and mechanical compatibility within the following parameters:

Primary Substitution Criteria:

• Inductance value: 6.8 µH (exact match required)
• Inductance tolerance: ±20%
• Core material: Ferrite
• Shielding: Shielded configuration
• Mounting type: Surface Mount
• Operating temperature range: Minimum -55°C ~ 125°C or better
• Frequency test specification: 100 kHz

Secondary Compatibility Parameters:

• Current rating capability
• DC resistance characteristics
• Physical package dimensions
• Product status and availability

The substitute part HRSPD74-682M maintains electrical equivalence through matching inductance value, tolerance, core material, and shielding characteristics. Mechanical compatibility is verified through surface mount packaging and nonstandard case format consistency.

Parameter Comparison

Engineering Selection Recommendations

SPD74-682M (Obsolete): This part is no longer in active production. Use only for repair or replacement of existing assemblies where no design changes are permissible.

HRSPD74-682M (Active Substitute): This part is the preferred substitute for new designs and long-term procurement strategies. API Delevan Inc. maintains active production status for this component, ensuring supply chain continuity and availability. The HRSPD74-682M shares the identical inductance value, tolerance, and core material with the SPD74-682M.

Selection Basis:

• Both components share identical electrical specifications for inductance and tolerance
• Shielded ferrite core configuration is maintained in both parts
• Surface mount packaging ensures mechanical compatibility
• HRSPD74-682M provides broader operating temperature capability (-55°C ~ 130°C versus -55°C ~ 125°C)
• Current rating difference (1.95 A versus 3.4 A) requires circuit-level evaluation
• Minimal physical dimension variation (0.29mm in length and width, 0.38mm in height) is typically acceptable in PCB layout
• Both components are RoHS non-compliant; compliance requirements should be addressed at the system level

Frequently Asked Questions (FAQ)

Q: Can HRSPD74-682M directly replace SPD74-682M in all applications? A: Electrical substitution is valid for inductance value and tolerance. The lower current rating of HRSPD74-682M (1.95 A versus 3.4 A) must be verified against circuit current requirements. Physical dimensions differ slightly; layout spacing confirmation is necessary.

Q: What is the primary difference between these two inductors? A: The SPD74-682M supports higher continuous current (3.4 A) with slightly lower DC resistance (42mOhm max). The HRSPD74-682M is the active production equivalent with lower current rating (1.95 A) but improved DC resistance (40mOhm max) and extended operating temperature range (130°C maximum).

Q: Are there any packaging differences that affect assembly? A: Both parts use surface mount assembly for nonstandard package formats. HRSPD74-682M is supplied in Tape & Reel (TR) packaging, while SPD74-682M does not specify packaging format. Physical dimensions are nearly identical with negligible variation in length (0.003"), width (0.003"), and height (0.013").

Q: How does the DC resistance comparison affect circuit performance? A: HRSPD74-682M provides slightly lower DC resistance (40mOhm max versus 42mOhm max). This reduces resistive losses during operation and represents a minor performance improvement.

Q: Is the operating temperature range difference significant? A: HRSPD74-682M extends the maximum operating temperature by 5°C (130°C versus 125°C). Both components cover the standard industrial range of -55°C. Temperature range selection depends on specific application thermal requirements.

Q: What compliance considerations apply to both parts? A: Both parts are RoHS non-compliant and REACH unaffected. System-level compliance assessment is required if RoHS certification is necessary for end applications.